315871155840 has 128 divisors (see below), whose sum is σ = 1010424093120. Its totient is φ = 83932405760.

The previous prime is 315871155827. The next prime is 315871155851. The reversal of 315871155840 is 48551178513.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×315871155840² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 315871155840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246787 + ... + 832253.

Almost surely, 2^315871155840 is an apocalyptic number.

315871155840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315871155840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505212046560).

315871155840 is an abundant number, since it is smaller than the sum of its proper divisors (694552937280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315871155840 is a wasteful number, since it uses less digits than its factorization.

315871155840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585770 (or 585758 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 48.

The spelling of 315871155840 in words is "three hundred fifteen billion, eight hundred seventy-one million, one hundred fifty-five thousand, eight hundred forty".